python – 尝试调用classmethods的代码中的各种错误

我有这个代码：

class SomeClass:
    @classmethod
    def func1(cls,arg1):
        #---Do Something---
    @classmethod
    def func2(cls,arg1):
        #---Do Something---

    # A 'function map' that has function name as its keys and the above function
    # objects as values
    func_map={'func1':func1,'func2':func2}

    @classmethod
    def func3(cls,arg1):
        # following is a dict(created by reading a config file) that
        # contains func names as keys and boolean as values that tells
        # the program whether or not to run that function
        global funcList
        for func in funcList:
            if funcList[func]==True:
                cls.func_map[func](arg1)        #TROUBLING PART!!!

    if _name__='main'
        SomeClass.func3('Argumentus-Primus')

当我运行这个时,我不断收到错误：

Exception TypeError: "'classmethod' object is not callable"

我无法弄清楚这有什么问题,非常感谢你的帮助.

解决方法:

在定义类之前,您无法创建对classmethods的引用.你必须将它移出类定义.但是,使用全局函数映射来确定运行的内容真的很尴尬.如果你描述了你想要做的事情,我们可能会建议一个更好的解决方案.

class SomeClass(object):
    @classmethod
    def func1(cls, arg1):
        print("Called func1({})".format(arg1))

    @classmethod
    def func2(cls, arg1):
        print("Call func2({})".format(arg1))

    @classmethod
    def func3(cls, arg1):
        for fnName,do in funcList.iteritems():
            if do:
                try:
                    cls.func_map[fnName](arg1)
                except KeyError:
                    print("Don't know function '{}'".format(fnName))

# can't create function map until class has been created
SomeClass.func_map = {
    'func1': SomeClass.func1,
    'func2': SomeClass.func2
}

if __name__=='__main__':
    funcList = {'func1':True, 'func2':False}
    SomeClass.func3('Argumentus-Primus')

标签：python,class-method
来源： https://codeday.me/bug/20190929/1831327.html